RACE-TRACK FLUXGATE SENSORS

被引：21

作者：

RIPKA, P

机构：

[1] Czech Technical University, Electrotechnical Faculty, Department of Measurement

来源：

SENSORS AND ACTUATORS A-PHYSICAL | 1993年 / 37-8卷

关键词：

D O I：

10.1016/0924-4247(93)80071-N

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A fluxgate sensor suitable for the vector measurement of small d.c. magnetic fields is described. The sensor core of oval (race-track) shape is etched from 35 mum amorphous tape. After symmetrization, 1 nT sensor offset and 10 pT rms noise are achieved. The tuned mode for sensor excitation utilizing non-linear resonance is discussed. The optimum pick-up coil length is derived. 9 mm diameter, 3 mm thick sandwich-type ring-core sensors made by the same technology are suitable for portable magnetometers with a resolution better than 1 nT. The methods for parametric amplification of the sensor output voltage, current output and detection of higher harmonics are discussed.

引用

页码：417 / 421

页数：5

共 10 条

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